HA-32
< PERIODIC MAINTENANCE >
ELECTRICAL LEAK DETECTOR
2.
Connect a suitable A/C manifold gauge set (SST: J-39183) to the A/C service valves.
3.
Check if the A/C refrigerant pressure is at least 345 kPa (3.52 kg/cm
2
, 50 psi) above 16
°
C (61
°
F).
Recover/evacuate and recharge the system with the specified amount of refrigerant if it is less than spec-
ification.
NOTE:
Leakages may not be detected since the system may not reach 345 kPa (3.52 kg/cm
2
, 50 psi) at temper-
atures below 16
°
C (61
°
F).
4.
Perform the leakage test from the high-pressure side (compressor discharge “a” to evaporator inlet “j”) to
the low-pressure side (evaporator drain hose “k” to shaft seal “p”). Perform a leakage check for the follow-
ing areas carefully. Clean the component to be checked and move the leakage detected probe completely
around the connection/component.
Compressor
Check the fitting of high- and low-pressure flexible hoses, relief valve and shaft seal.
Condenser
Check the fitting of condenser pipe assembly, high-pressure flexible hose and pipe.
Liquid tank
Check the fitting of condenser assembly and refrigerant pressure sensor.
Service valves
Check all around the service valves. Ensure service valve caps are secured on the service valves (to pre-
vent leakages).
NOTE:
Wipe any residue from valves to prevent any false readings by leak detector after removing A/C manifold
gauge set from service valves.
Cooling unit (Evaporator)
Turn blower fan on “High” for at least 15 seconds to dissipate any refrigerant trace in the cooling unit with
engine OFF. Wait a minimum of 10 minutes (refer to the manufacturer’s recommended procedure for the
actual wait time) before inserting the leak detector probe into the drain hose.
Keep the probe inserted for at least 10 seconds. Be careful not to contaminate the probe tip with water or
dirt that may be in the drain hose.
5.
Verify at least once by blowing compressed air into area of suspected leakage, then repeat the check as
outlined above if a leak detector detects a leakage.
6.
Do not stop when one leakage is found. Continue checking for additional leakages at all system compo-
nents.
If no leakages are found, perform steps 7 - 10.
JPIIA0458GB